updated core to 1.7.15

system/src/Grav/Common/Browser.php

@@ -1,18 +1,23 @@
 <?php
+
 /**
- * @package    Grav.Common
+ * @package    Grav\Common
  *
- * @copyright  Copyright (C) 2015 - 2018 Trilby Media, LLC. All rights reserved.
+ * @copyright  Copyright (c) 2015 - 2021 Trilby Media, LLC. All rights reserved.
  * @license    MIT License; see LICENSE file for details.
  */
 
 namespace Grav\Common;
 
+use InvalidArgumentException;
+use function donatj\UserAgent\parse_user_agent;
+
 /**
  * Internally uses the PhpUserAgent package https://github.com/donatj/PhpUserAgent
  */
 class Browser
 {
+    /** @var string[] */
     protected $useragent = [];
 
     /**
@@ -22,7 +27,7 @@ class Browser
     {
         try {
             $this->useragent = parse_user_agent();
-        } catch (\InvalidArgumentException $e) {
+        } catch (InvalidArgumentException $e) {
             $this->useragent = parse_user_agent("Mozilla/5.0 (compatible; Unknown;)");
         }
     }
@@ -107,13 +112,13 @@ class Browser
     /**
      * Get the current major version identifier
      *
-     * @return string the browser major version identifier
+     * @return int the browser major version identifier
      */
     public function getVersion()
     {
         $version = explode('.', $this->getLongVersion());
 
-        return intval($version[0]);
+        return (int)$version[0];
     }
 
     /**
@@ -134,4 +139,15 @@ class Browser
 
         return true;
     }
+
+    /**
+     * Determine if “Do Not Track” is set by browser
+     * @see https://www.w3.org/TR/tracking-dnt/
+     *
+     * @return bool
+     */
+    public function isTrackable(): bool
+    {
+        return !(isset($_SERVER['HTTP_DNT']) && $_SERVER['HTTP_DNT'] === '1');
+    }
 }